Many megalithic tombs have been destroyed over the centuries and the remaining buildings represent only a fraction of the original number. E. Sprockhoff listed 900 for German Empire in 1938. Today this number is around 1,350 for that area. In Denmark today 2,067 tombs are known on an area roughly half the size than the megalithic areas of Germany. The estimates of the original number of buildings in the TRB area vary. In Denmark it is thought to be three times as much as today, i.e. around 6000. In Schleswig-Holstein, Germany the degree of destruction was much higher and up to 95 % of the original building might be lost. That means with around 300 buildings today the original number might have been around 6000 in this area of Germany (estimate: Landesmuseum Schl.-Holstein).